ProxyAnimationGeneric<T>  constructor 
      
      ProxyAnimationGeneric<T> ([ 
    
- Animation<T> ? animation,
- T? defaultValue
Creates a proxy animation.
If the animation argument is omitted, the proxy animation will have the status AnimationStatus.dismissed and a value of 0.0.
Implementation
ProxyAnimationGeneric([Animation<T>? animation, T? defaultValue]) {
  _parent = animation;
  if (_parent == null) {
    _status = AnimationStatus.dismissed;
    _value = defaultValue;
  }
}